These chucks are available with 3 jaws and 4 jaws and are referred as BRC-3 and BRC-4 respectively. The jaws are specially designed to grip machined or un-machined Bearing races. BRC-4 chucks are used to grip bearing races having thin walls as holding pressure is divided on six sides. One set of reverse Jaws, Mounting Bolts, Operating Key and Inspection Report is provided with each chuck.